Related Experiment Video
Updated: Feb 7, 2026
08:35
Examining BCL-2 Family Function with Large Unilamellar Vesicles
Published on: October 5, 2012
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Rewired Neuroactive Ligand-Receptor Signaling Confers Adaptive Resistance to BCL-2 Inhibition in AML
Hiroaki Koyama1, Sachiko Seo2, William Tse1
1Case Western Reserve University.
Research Square
|February 6, 2026
Summary
Drug resistance to venetoclax in acute myeloid leukemia (AML) is a major challenge. Researchers identified a BCL-2-independent resistance mechanism involving the neuroactive ligand-receptor interaction pathway and CHRNB4 downregulation, offering new therapeutic targets.
Area of Science:
- Hematology
- Oncology
- Molecular Biology
Background:
- Venetoclax is a BCL-2 inhibitor used to treat acute myeloid leukemia (AML).
- Drug resistance to venetoclax is a significant clinical challenge, leading to poor patient outcomes.
- The mechanisms underlying venetoclax resistance in AML are not fully understood.
Purpose of the Study:
- To investigate the mechanisms of BCL-2 inhibitor resistance in AML.
- To identify novel therapeutic targets and predictive biomarkers for venetoclax treatment in AML.
Main Methods:
- Established venetoclax-resistant AML cell models (Kasumi-1/VENK and MV4-11/VENM).
- Performed in vitro and in vivo proliferation assays and tumorigenicity studies.
- Utilized RNA sequencing and KEGG pathway analysis to identify molecular alterations.
Main Results:
- Resistant AML cells exhibited enhanced proliferation and tumorigenicity, suggesting BCL-2-independent resistance.
- The neuroactive ligand-receptor interaction (NLRI) pathway was identified as a key vulnerability.
- Downregulation of CHRNB4 was common in resistant cells and tumors, correlating with poor survival and diminished venetoclax response in patients.
Conclusions:
- The NLRI pathway represents a crucial vulnerability in venetoclax-resistant AML.
- CHRNB4 downregulation is a potential predictive biomarker for venetoclax treatment response.
- Targeting the NLRI pathway may offer a novel therapeutic strategy for overcoming venetoclax resistance in AML.
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